The ALMA survey to Resolve exoKuiper belt Substructures (ARKS) - VII. Optically thick gas with broad CO gaussian local line profiles in the HD 121617 disc

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Fig. 4

Local line profiles for ¹²CO (blue) and ¹³CO (red) created from an annulus extracted at the peak gas surface density ( $0_{\cdot}^{''} 61$ $\[0^{\prime\prime}_\cdot61\]$ – $0_{\cdot}^{''} 63$ $\[0^{\prime\prime}_\cdot63\]$ ). Best-fit models (dashed lines) are generated using best-fit values from Table 3. Top left: spectral resolution for ¹²CO (blue) and ¹³CO (red). Error bars for ¹²CO (blue) and ¹³CO (red) have been re-scaled by the fitted factor f₁₂ and f₁₃.

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